Restructuring (credits) charges - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
2017 Vascular Solutions integration program
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1.7		$ 1.7
2017 Vascular Solutions integration program | Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	6.0		6.0
2017 Vascular Solutions integration program | Minimum | Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	4.5		4.5
2017 Vascular Solutions integration program | Minimum | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	1.5		1.5
2017 Vascular Solutions integration program | Minimum | Retention Bonuses
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	2.5		2.5
2017 Vascular Solutions integration program | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	7.5		7.5
2017 Vascular Solutions integration program | Maximum | Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	5.3		5.3
2017 Vascular Solutions integration program | Maximum | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	2.2		2.2
2017 Vascular Solutions integration program | Maximum | Retention Bonuses
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	3.0		3.0
2017 EMEA restructuring program
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	6.0		6.0
2017 EMEA restructuring program | Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	7.1		7.1
2017 EMEA restructuring program | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	8.5		8.5
2016 Other Restructuring programs
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected cash payment	1.0		1.0
Restructuring reserve	0.8		0.8
2016 Other Restructuring programs | Accelerated Depreciation And Other Costs
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	1.5		1.5
2016 Other Restructuring programs | Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	3.8		3.8
2016 Other Restructuring programs | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	4.7		4.7
2016 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	7.9		7.9
Aggregate restructuring charges incurred	13.8		13.8
2016 Footprint realignment plan | Accelerated Depreciation And Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1.4	$ 1.9	5.5	$ 4.2
Aggregate restructuring charges incurred	12.0		12.0
2016 Footprint realignment plan | Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	34.0		34.0
Restructuring costs expected cash payment	27.0		27.0
2016 Footprint realignment plan | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	44.0		44.0
Restructuring costs expected cash payment	31.0		31.0
2014 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	4.2		4.2
Restructuring expenses			25.9
Aggregate restructuring charges incurred	11.5		11.5
2014 Footprint realignment plan | Accelerated Depreciation And Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1.0	$ 2.5	3.1	$ 6.9
2014 Footprint realignment plan | Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	43.0		43.0
Restructuring costs expected cash payment	33.0		33.0
Expected capital expenditures	24.0		24.0
2014 Footprint realignment plan | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	48.0		48.0
Restructuring costs expected cash payment	38.0		38.0
Expected capital expenditures	$ 30.0		$ 30.0